[omniORB] Returning None Where Structs Are Required

[Stefan Seefeld]

"Gary D. Duzan" wrote:

>    The CORBA/IDL model doesn't allow for null structs. The two
> alternatives that sprint to mind would be to throw an exception
> when you hit the end of the iteration, or always return a sequence
> of structs, leaving it empty if there is no more data.

I would strongly suggest to use the de-facto iterator API that is already
used elsewhere (for example in the Naming Service). I.e. something like

interface Iterator 
{
  boolean next_one (out Item i);
  boolean next_n   (in unsigned long how_many, out ItemSeq is);
  void    destroy  ();
};

since programmers will recognize it and know how to use it.

Regards,
		Stefan